Linux Kernel up to 5.17.3 include/linux/skbuff.h skb_headlen privilege escalation

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4.9	$0-$5k	0.00

Summaryinfo

A vulnerability identified as problematic has been detected in Linux Kernel up to 5.17.3. Affected by this vulnerability is the function skb_headlen in the library include/linux/skbuff.h. The manipulation leads to an unknown weakness. This vulnerability is documented as CVE-2022-49066. There is not any exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in Linux Kernel up to 5.17.3. It has been rated as problematic. This issue affects the function skb_headlen in the library include/linux/skbuff.h. The impact remains unknown. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: veth: Ensure eth header is in skb's linear part After feeding a decapsulated packet to a veth device with act_mirred, skb_headlen() may be 0. But veth_xmit() calls __dev_forward_skb(), which expects at least ETH_HLEN byte of linear data (as __dev_forward_skb2() calls eth_type_trans(), which pulls ETH_HLEN bytes unconditionally). Use pskb_may_pull() to ensure veth_xmit() respects this constraint. kernel BUG at include/linux/skbuff.h:2328! RIP: 0010:eth_type_trans+0xcf/0x140 Call Trace: __dev_forward_skb2+0xe3/0x160 veth_xmit+0x6e/0x250 [veth] dev_hard_start_xmit+0xc7/0x200 __dev_queue_xmit+0x47f/0x520 ? skb_ensure_writable+0x85/0xa0 ? skb_mpls_pop+0x98/0x1c0 tcf_mirred_act+0x442/0x47e [act_mirred] tcf_action_exec+0x86/0x140 fl_classify+0x1d8/0x1e0 [cls_flower] ? dma_pte_clear_level+0x129/0x1a0 ? dma_pte_clear_level+0x129/0x1a0 ? prb_fill_curr_block+0x2f/0xc0 ? skb_copy_bits+0x11a/0x220 __tcf_classify+0x58/0x110 tcf_classify_ingress+0x6b/0x140 __netif_receive_skb_core.constprop.0+0x47d/0xfd0 ? __iommu_dma_unmap_swiotlb+0x44/0x90 __netif_receive_skb_one_core+0x3d/0xa0 netif_receive_skb+0x116/0x170 be_process_rx+0x22f/0x330 [be2net] be_poll+0x13c/0x370 [be2net] __napi_poll+0x2a/0x170 net_rx_action+0x22f/0x2f0 __do_softirq+0xca/0x2a8 __irq_exit_rcu+0xc1/0xe0 common_interrupt+0x83/0xa0

The advisory is shared at git.kernel.org. The identification of this vulnerability is CVE-2022-49066 since 02/26/2025. The exploitation is known to be difficult. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 241018 (EulerOS 2.0 SP13 : kernel (EulerOS-SA-2025-1704)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 4.9.311, 4.14.276, 4.19.239, 5.4.190, 5.10.112, 5.15.35 or 5.17.4 eliminates this vulnerability. Applying the patch 3de2a02b60a4ef0ab76263216f08c7d095fc7c42/d417a859221f127e8edf09c14b76ab50f825e171/1ef0088e43af1de4e3b365218c4d3179d9a37eec/2fd90b86dff413fbf8128780c04ea9c6849c16e2/d67c900f1947d64ba8a64f693504bcaab8d9000c/93940fc4cb81840dc0fa202de48cccb949a0261d/46bc359fec0c6d87b70d7a008bcd9a5e30dd6f27/726e2c5929de841fdcef4e2bf995680688ae1b87 is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at Tenable (241018). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 4.9.310
• 4.14.275
• 4.19.238
• 5.4.189
• 5.10.111
• 5.15.0
• 5.15.1
• 5.15.2
• 5.15.3
• 5.15.4
• 5.15.5
• 5.15.6
• 5.15.7
• 5.15.8
• 5.15.9
• 5.15.10
• 5.15.11
• 5.15.12
• 5.15.13
• 5.15.14
• 5.15.15
• 5.15.16
• 5.15.17
• 5.15.18
• 5.15.19
• 5.15.20
• 5.15.21
• 5.15.22
• 5.15.23
• 5.15.24
• 5.15.25
• 5.15.26
• 5.15.27
• 5.15.28
• 5.15.29
• 5.15.30
• 5.15.31
• 5.15.32
• 5.15.33
• 5.15.34
• 5.17.0
• 5.17.1
• 5.17.2
• 5.17.3

License

• open-source

Website

• Vendor: https://www.kernel.org/

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.0
VulDB Meta Temp Score: 4.9

VulDB Base Score: 4.6
VulDB Temp Score: 4.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Privilege escalation
CWE: Unknown
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 241018
Nessus Name: EulerOS 2.0 SP13 : kernel (EulerOS-SA-2025-1704)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Kernel 4.9.311/4.14.276/4.19.239/5.4.190/5.10.112/5.15.35/5.17.4
Patch: 3de2a02b60a4ef0ab76263216f08c7d095fc7c42/d417a859221f127e8edf09c14b76ab50f825e171/1ef0088e43af1de4e3b365218c4d3179d9a37eec/2fd90b86dff413fbf8128780c04ea9c6849c16e2/d67c900f1947d64ba8a64f693504bcaab8d9000c/93940fc4cb81840dc0fa202de48cccb949a0261d/46bc359fec0c6d87b70d7a008bcd9a5e30dd6f27/726e2c5929de841fdcef4e2bf995680688ae1b87

Timelineinfo

02/26/2025 🔍
02/26/2025 +0 days 🔍
02/26/2025 +0 days 🔍
10/15/2025 +231 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2022-49066 (🔍)
GCVE (CVE): GCVE-0-2022-49066
GCVE (VulDB): GCVE-100-297341

Entryinfo

Created: 02/26/2025 11:16
Updated: 10/15/2025 04:29
Changes: 02/26/2025 11:16 (57), 07/01/2025 17:47 (2), 10/15/2025 04:29 (12)
Complete: 🔍
Cache ID: 216::103

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Discussion

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